docs: def _load(self, scale=1.0):
          """Load the MetImage RSR data for the band requested"""
          data = np.genfromtxt(self.requested_band_filename,
                               unpack=True,
                               names=['wavenumber',
                                      'response'],
                               skip_header=4)
  
          # Data are wavenumbers in cm-1:
          wavelength = 1. / data['wavenumber'] * 10000.
          response = data['response']
  
          # The real MetImage has 24 detectors. However, for now we store the
          # single rsr as 'detector-1', indicating that there will be multiple
          # detectors in the future:
          detectors = {}
          detectors['det-1'] = {'wavelength': wavelength, 'response': response}
          self.rsr = detectors